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Testing Lorentz invariance and CPT conservation with NuMI neutrinos in the MINOS near detector |
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| Authors: | Adamson P Andreopoulos C Arms K E Armstrong R Auty D J Ayres D S Baller B Barr G Barrett W L Becker B R Belias A Bernstein R H Bhattacharya D Bishai M Blake A Bock G J Boehm J Boehnlein D J Bogert D Bower C Buckley-Geer E Cavanaugh S Chapman J D Cherdack D Childress S Choudhary B C Coleman S J Culling A J de Jong J K Diwan M V Dorman M Dytman S A Escobar C O Evans J J Falk Harris E Feldman G J Frohne M V Gallagher H R Goodman M C Gouffon P Gran R Grashorn E W Grossman N Grzelak K Habig A Harris D Harris P G Hartnell J Hatcher R Heller K Himmel A Holin A Hylen J Irwin G M Ishitsuka M Jaffe D E |
| Institution: | Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA. |
| Abstract: | A search for a sidereal modulation in the MINOS near detector neutrino data was performed. If present, this signature could be a consequence of Lorentz and CPT violation as predicted by the effective field theory called the standard-model extension. No evidence for a sidereal signal in the data set was found, implying that there is no significant change in neutrino propagation that depends on the direction of the neutrino beam in a sun-centered inertial frame. Upper limits on the magnitudes of the Lorentz and CPT violating terms in the standard-model extension lie between 10(-4) and 10(-2) of the maximum expected, assuming a suppression of these signatures by a factor of 10(-17). |
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